The World of Mystara - http://webnexus1.tripod.com/theworldofm ... index.htmlAn excellent resource with pages to introduce players to all the major nations, and guide them through Cyclopedia character creation.

A review site with some really in-depth looks at Mystara and OD&D products. It seems to have been a long time in the making, and is far from complete, but what's there is great. I read the Karameikos review and it was very insightful.